INFRARED HIGH-RESOLUTION SPECTRA OF OZONE IN THE RANGE 5500-5570CM(-1) - ANALYSIS OF NU(2)-NU(3)-BAND AND NU(1)+NU(2)+4-NU(3)-BAND(5)

The nu 2 + 5 nu(3) and nu(1) + nu(2) + 4 nu(3) bands of ozone, which o ccur in the 5500 cm(-1) region, have been observed for the first time using a Fourier transform spectrometer, operating at 0.008 cm(-1) reso lution and with a large pathlength x pressure product (3216 cm x 28.3 Torr). The assignment of rotation-vibration transitions has been done for J up to 35 and Ka up to 12, for the nu(2) + 5 nu(3) band and up to J = 40 and Ka = 2 for the nu(1) + v(2) + 4 nu(3) band respectively. T he effective Hamiltonian used in calculations accounts for the first-o rder Coriolis coupling between these two bands. In addition, as the le vels corresponding to Ka = 5 are perturbed, it was necessary to accoun t for anharmonic resonance with the (321) state. Also, to correctly re produce the levels of (015) with Ka = 8, 9, 10 it has been necessary t o include a Coriolis coupling with (080) state in the model. In this w ay, we have obtained a very satisfactory r.m.s. deviation of 2.4 x 10( -3) cm(-1), near the experimental accuracy. Rovibrational line intensi ties of nu(2) + 5 nu(3) and nu(1) + nu(2) + 4 nu(3) bands were measure d and the value of the principal transition moment constants have been recovered. Finally a complete list of line positions and intensities was calculated leading to the integrated band intensity of S-nu = 9.33 x 10(-23) cm(-1)/molecule cm(-2) for the nu(2) + 5 nu(3) band and S-n u = 1.44 x 10(-23) cm(-1)/molecule cm(-2) for the nu(1) + nu(2) + 4 nu (3) band at 296K with a cut-off of 3 x 10(-26).